Apparatus for balancing masses at a punch press

ABSTRACT

An apparatus for balancing the masses at a transverse shaftdouble connecting rod-punch press for follow dies or the like wherein the press ram is driven through the agency of two pressure columns, guides and double levers from a crank defined by the double connecting rods arranged at the transverse shaft. For balancing the vertically moved masses and the vertical components of the eccentrically rotating masses, the crosshead driven by the crank and guided in vertical direction carries a balance weight. For balancing the horizontal components of the eccentrically rotating masses there are provided further balance weights connected with the crank through the agency of double levers and guides mounted at the press housing.

United States Patent 1 t 1 W M Portmann Jan. 8, 1974 [5 APPARATUS FOR BALANCING MASSIES AT 2,503,037 4/1950 Georgeff 74/40 A PUNCH PRESS Primary ExaminerBenjamin W. Wyche [75] Inventor. August Thomas Portmann, Arbon, Assistant Examiner wesley S Ratliff Jr.

Swltzerland Attorney- Ladas, Farry, Von Gehr, Goldsmith 8t [73] Assignee: Bruderer AG., Arbon, Switzerland Deschamps [22] Filed: Sept. 26, 1972 [21] Appl. No.: 292,378

[5 7] ABSTRACT An apparatus for balancing the masses at a transverse shaft-double connecting rod-punch press for follow [30] F i A li i P i i D m dies or the like wherein the press ram is driven through the agency of two pressure co umns, guides O t. 1,1971 S t l d 14367 71 c zer an I and double levers from a crank defined by the double [52] US. Cl. 74/40 connecting rods arranged at the transverse shaft' For 51 Int. Cl. r1611 21/32 balancing the vertically mved masses and the vertical 5 [d h 74 40; 308 CH components of the eccentrically rotating masses, the 8] Fle of I l crosshead driven by the crank and guided in vertical [56] References Cited direction carries a balance weight. For balancing the horizontal components of the eccentrically rotating UNITED STATES PATENTS masses there are provided further balance weights Uebel onne ted the crank through the agency of doug; 3: ble levers and guides mounted at the press housing.

3 Claims, 3 Drawing Figures APPARATUS FOR BALANCING MASSES AT A PUNCH PRESS BACKGROUND AND SUMMARY OF THE INVENTION The present invention relates to a new and improved apparatus for the balancing of masses at a transverse shaft-double connecting rod-press punch for follow dies wherein the press ram is driven through the agency of two pressure columns, guides and double levers from a crank arranged at the transverse shaft.

With such punch presses and in consideration of the high rotational speeds of the machine which is desired, there should be realized a complete balancing of the masses in order to prevent vibrations acting towards the outside.

It is therefore an important object of the present invention to provide a complete balancing of the masses in order to prevent such vibrations at punch presses.

Now in order to realize this objective, the inventive apparatus is manifested by the features that for the purpose of balancing the vertically moved masses and the vertical components of the eccentrically rotating masses, the crosshead guided in vertical direction and driven by the crank carries a balance weight. Furthermore, for balancing the horizontal components of the eccentrically rotating masses there are provided further balance weights which are connected via double lever means and guide means mounted at the housing with the connecting rod-crank arrangement.

The further balance weights are advantageously displaceably guided upon the guide means and elevationally movable with such guide means, so that apart from balancing the horizontal components of the eccentrically rotating masses they also bring about a partial balancing of the vertically moved masses.

BRIEF DESCRIPTION OF THE DRAWINGS The invention will be better understood and objects other than those set forth above, will become apparent when consideration is given to the following detailed description thereof. Such description makes reference to 'the annexed drawings wherein:

FIG.-1 is a vertical sectional view at the longitudinal central plane of a presspunch' designed according to the teachings of the present invention;

FIG. 2 is a vertical sectional view at the transverse central plane of the press punch of FIG..1, taken substantially along the line II-II thereof; and

FIG. 3 is a vertical sectional view of the press punch of FIG. 1, taken substantially along the line III-III thereof.

DETAILED DESCRIPTION OF THE PREFERRED I EMBODIMENTS Describing now the drawings, the table 1 of the illustrated punch press or stamping machine forms a frame extending along the four sides this frame containing an ram 9. These guide columns 8, as illustrated, extend into the band travel plane B and at such plane are guided at the guide bushings 7, to which oil is delivered by conduits or lines 10 for the purpose of lubrication.

The leakage oil from the guide bushings or sleeves 7 can flow through the support columns 6 and me hollow constructed screws 5 into the oil sump 2 of the table 1. At the underside of the ram 9 there can be secured a non-illustrated upper forming part and at the middle or central portion of the ram 9 there is formed a hollow compartment 11 containing cooling oil. At both sides of the ram 9 there is secured between two respective reinforcement ribs 12 a respective pressure column 13. At each pressure column 13 there is secured a sealing or packing sleeve 14 which is arranged to be movable laterally to all sides at the housing portion 16 bearing upon the support brackets 6 and secured by means of screws 15. Oil infeed lines 17 are connected to both packing sleeves 14. Furthermore, at the left-hand located pressure column 13 of FIG. ll there is provided a connection channel 18 extending from the packing sleeve 14 surrounding this column to the hollow compartment ll of the ram 9. From this hollow compartment 1111 there extends a connection channel 19 through the right-hand located pressure column 13 into the interior of the housing portion 16. Hence, the oil can thus circulate through the ram 9 from the infeed line or conduit 17 through the left-hand located sealing or packing sleeve 14 and pressure column 113 into the hollow compartment 13, then through the right-hand located pressure column 13 and packing sleeve 14 into the interior of housing portion 116.

The oil sump at the housing upper portion 16 is connected through the agency of non-illustrated connection lines with the oil sump 2 present at the machine table ll, so that a common oil circulation occurs both through the ram 9 as well as also through the machine table 1. The oil sump 2 is of annular or ring-shaped construction and extends along the periphery of the table 1. The oil infeed or delivery occurs at one side of a partition wall within the sump 2 and the oil outfeed or departure at the other side thereof, so that there occurs a circulation of the oil over the entire periphery of the machine table. Each pressure column 13 is hingedly connected through the agency of a respective pin 20 with a bifurcated or forked guide 21 which at its other end is articulated by means of pin 22 at a respective double levers 23. Each of the double levers 23 is mounted upon a respective eccentric 24, the bearing or support pin 25 of which is mounted in the housing portion 16. The other ends of both double levers 23 are mounted upon a respective bearing pin 26 which is hingedly connected by short guides 27 with a pin 23 of a crosshead 29. This crosshead 29 is guided for vertical movement between two ribs 30 of the housing portion 16 and at the top of which there is secured by screws 31 or the like a balance weight 32.

This balance weight 32 serves for balancing the vertically moving masses and the vertical components of the eccentrically moved masses. Two connecting rods 33 defining a crank arrangement hingedly engage with the crosshead pin 28, these connecting rods 33 travelling at an eccentric 341 of a transverse shaft 35 which is driven mounted at the housing portion 16. Guides 38 are hingedly connected at one end at two pins 37 at the two connecting rods 33, the other ends of which guides 39 are hingedly connected by means of a respective pin 40 with one end of a respective double lever 39. Each double or double-arm lever 39 is rotatably mounted upon a pin 41 which is supported at an extension or projection 42 of the housing portion 16. The other end of the double lever 39 is articulated by means of a pin 43 to one end of a guide 44, the other end of which is articulated by means of a pin 45 to a balance weight 46 displaceably arranged upon the associated guide 38. Both balance weights 46 are intended to balance the horizontal components of the eccentrically rotating masses. Owing to the fact that the balance weights 46 are guided upon the guides 38, they move elevationally, i.e., up and down with such guides 38, so that apart from balancing the horizontal components of the eccentrically rotating masses they also bring about a partial balancing of the vertically moving masses. The balance weight 32 present at the crosshead 29 therefore can be designed to be smaller.

While there is shown and described present preferred embodiments of the invention, it is to be distinctly understood that the invention is not limited thereto but may be otherwise variously embodied and practiced within the scope of the following claims. ACCORD- INGLY,

What is claimed is:

1. An apparatus for balancing the masses of a transverse shaft-double connecting rod-punch press comprising a housing provided with a press ram, a transverse shaft, a double connecting rod forming a crank arrangement provided for the transverse shaft, two

pressure columns, guides and double levers for driving the press ram via the crank arrangement, a crosshead guided in vertical direction and driven by the crank arrangement, a balance weight carried by the crosshead for balancing the vertically moved masses and the vertical components of eccentric rotating masses, at least one further balance weight for balancing the horizontal components of the eccentric rotating masses, said further balance weight being connected with the connecting rods through the agency of double lever means and guide means mounted in the housing.

2. The apparatus as defined in claim 1, wherein the further balance weight is displaceably guided upon the guide means and elevationally movable with such guide means, so that apart from balancing the horizontal components of the eccentrically rotating masses it also brings about a partial balancing of the vertically moved masses.

3. The apparatus as defined in claim 2, wherein said double lever means includes respective double lever elements, said housing including an upper portion having a respective projection, a still further balancing weight, wherein a respective one of each further balancing weight is arranged at each side of the crank arrangement, each double lever element being associated with a respective one of the further balancing weights, and each said double lever element being mounted upon a respective projection of the upper housing portion. 

1. An apparatus for balancing the masses of a transverse shaftdouble connecting rod-punch press comprising a housing provided with a press ram, a transverse shaft, a double connecting rod forming a crank arrangement provided for the transverse shaft, two pressure columns, guides and double levers for driving the press ram via the crank arrangement, a crosshead guided in vertical direction and driven by the crank arrangement, a balance weight carried by the crosshead for balancing the vertically moved masses and the vertical components of eccentric rotating masses, at least one further balance weight for balancing the horizontal components of the eccentric rotating masses, said further balance weight being connected with the connecting rods through the agency of double lever means and guide means mounted in the housing.
 2. The apparatus as defined in claim 1, wherein the further balance weight is displaceably guided upon the guide means and elevationally movable with such guide means, so that apart from balancing the horizontal components of the eccentrically rotating masses it also brings about a partial balancing of the vertically moved masses.
 3. The apparatus as defined in claim 2, wherein said double lever means includes respective double lever elements, said housing including an upper portion having a respective projection, a still further balancing weight, wherein a respective one of each further balancing weight is arranged at each side of the crank arrangement, each double lever element being associated with a respective one of the further balancing weights, and each said double lever element being mounted upon a respective projection of the upper housing portion. 